A simple satellite antenna rotator with an android app that calculates the position of any satellite using its "kepler elements", and sends the relative direction to the Az-El antenna rotator to track the satellite across the sky.
The onboard microprocessor is an ESP8266 NodeMCU board with wifi-capability that can be controlled manually in a web-interface or automatically through an android app.
The build is open source, the files you need to 3D-print your own are available from the website. Have fun!
/ Daniel www.satran.io